/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package dungnaServlet;

import helper.ConnectionHelper;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import helper.ConnectionHelper;
import java.text.DateFormat;
import java.util.Date;
import javax.servlet.http.HttpSession;

/**
 *
 * @author AnhDung
 */
@WebServlet(name="checkLogin", urlPatterns={"/checkLogin"})
public class checkLogin extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        if (request.getSession().getAttribute("username") == null)
        {
            response.sendRedirect("login.jsp");
        }
        else
        {
            HttpSession session = request.getSession();
            Date last = new Date(session.getLastAccessedTime());
            Date now = new Date();
            DateFormat format = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM);
            String myname =  (String)request.getSession().getAttribute("username");
            out.println("Welcome  "+myname+"");
            out.println("Welcome  "+format.format(last));
            java.text.SimpleDateFormat formater= new java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss a");
            java.util.GregorianCalendar today= new java.util.GregorianCalendar();
            try
            {
                String s = "INSERT INTO Users (LastActionDate) values (?)";
                Connection con = ConnectionHelper.GetConnection();
                PreparedStatement p = con.prepareStatement(s);
                p.setString(8, format.format(last));
                int i = p.executeUpdate();
                if(i>0)
                {
                    return;
                }
            }
            catch (SQLException ex) {
                ex.printStackTrace();
                //Logger.getLogger(checkLogin.class.getName()).log(Level.SEVERE, null, ex);
            }        }

        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet checkLogin</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet checkLogin at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
            */
        } finally { 
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
